Re: [HACKERS] btree_gin and btree_gist for enums

On 02/23/2017 04:41 PM, Tom Lane wrote:
> Andrew Dunstan <andrew.dunstan@2ndquadrant.com> writes:
>> I'm not entirely sure how I should replace those DirectFunctionCall2 calls.
> Basically what we want is for the called function to be able to use the
> fcinfo->flinfo->fn_extra and fcinfo->flinfo->fn_mcxt fields of the
> FmgrInfo struct that GIN has set up for the btree_gin support function.
>
> The fast but somewhat scary way to do it would just be to pass through
> the flinfo pointer as-is.  Imagine that fmgr.c grows a set of functions
> like
>
>  [...]



Here's a POC for btree_gin based on my original patch. I just made your
function static in btree_gin.c at least for now. I stayed with the
DirectFunctionCall2 use in the type-specific routines where calling
context wasn't needed (i.e. everything except enums). But it looks more
than ugly and highly invasive for btree_gist, and sadly that's my main
use case, exclusion constraints with enum fields.

cheers

andrew


-- 
Andrew Dunstan                https://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services


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